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x86/ptrace: Mark expected switch fall-through
Mark switch cases where we are expecting to fall through. Fix the following warning (Building: allnoconfig i386): arch/x86/kernel/ptrace.c:202:6: warning: this statement may fall through [-Wimplicit-fallthrough=] if (unlikely(value == 0)) ^ arch/x86/kernel/ptrace.c:206:2: note: here default: ^~~~~~~ Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lkml.kernel.org/r/20190805195654.GA17831@embeddedor
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@ -201,6 +201,7 @@ static int set_segment_reg(struct task_struct *task,
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case offsetof(struct user_regs_struct, ss):
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if (unlikely(value == 0))
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return -EIO;
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/* Else, fall through */
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default:
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*pt_regs_access(task_pt_regs(task), offset) = value;
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